Hi Eric,
Actually, this was a replacement unit (original did same thing), so it definitely has affected more than one panel. I've since received my original back and it works. I am in the process of trying to find out what they did to rectify the problem.
I also have an intermittent connection issue, similar to what you have described. All five panels would stay connected for 30 seconds at a time then, one by one, lose connection for only 1-2 seconds. The one unit that came back from service no longer has this issue, making me even more interested in what work was done.
I have had my local dealer here, to see the problem first hand, but they still aren't sure what the cause is. I will keep you posted on anything new I learn.
Lisa